Mine-shaft roller.



J. GEMMELL.

MINE SHAFT ROLLER.

APPLICATION FILED NOV. 13. 1914.

Patented Feb. 8,1916.

WITNESSES B) I & A 7TOR/VEY THE COLUMBIA PLAIflbGRAPn co., WASHING-5N,D. c.

JOHN GEMMELL, 0F CALUMET, MICHIGAN.

MINE-SHAFT ROLLER.

Specification of Letters Patent.

Patented Feb. 8, 1916.

Application filed November 13, 1914. Serial No. 871,872.

To all whom it may concern:

Be it known that I, JOHN GEMMELL, a subject of the King of Great Britainand Ireland, residing at Calumet, in the county of Houghton and State ofMichigan, have invented certain new and'useful Improvements inMine-Shaft Rollers, of which the following is a specification, referencebeing had to the accompanying drawings.

This invention relates to improvements in shaft rollers and particularlyto improvements in shaft rollers adapted for use in mines; and an objectof this invention is to provide a shaft roller of the character justreferred to which will be simple in construction, comparatively cheap inmanufacture and eflicient and durable in operation and use.

Another object of this invention is to provide a mine-shaft roller whichwill be susceptible of adjustment lengthwise of they roller.

In the drawings illustrating the principle of this invention and thebest mode now known to me of applying that principle, Figure 1 is asection on the line AA of Fig. 2; and Fig. 2 is a view looking in thedirection of the arrow B of Fig. 1, the cable being omitted.

Upon each of the stringers or beams a there is fastened a rail 6 whichdoes not differ materially from the ordinary railway rail; and, uponthese rails b, there runs the skip or cage (not shown). To the beams athere are suitably fastened (as by lag screws 0) a pair of uppercross-pieces (Z and a pair of lower cross-pieces 6. Each uppercrosspiece cl is separated from the lower crosspiece 6 opposed to it bya space which forms a guideway ffand, near the middle of this guidewaythere is fastened a block 9. The mine-shaft roller 71 is mounted fastupon a spindle z and is formed with circumferential grooves j. Theroller 72, is mounted upon a carriage 7c the end-pieces m of whichv areconnected by a pair of side members n formed with teeth 0. Fastened toeach of the upper cross-pieces (Z is a toothed lockingmember 10 which isfree to swing toward and from the toothed members a of the carriage. Theprojecting ends z" of the spindle z are mounted free to rotate in the journal-boxes 9 carried by the end-pieces m. The cable r runs over theroller 72. through one of the grooves y thereof.

When it is desired to change the travel of the cable r from one of thegrooves j to another thereof, the toothed hinged pieces 2 are raised outof engagement with the toothed carriage members 0, thereby permittingthe carriage 76 to be adjusted so as to bring one of the other groovesinto position 1 to receive the cable; and, after this adjustment hasbeen made, the toothed members 39 are swung back again into engagementwith the toothed carriage'members 0.

I claim:

1. In a structure of the class described,

the combination of acable-railway; a cable for propelling the carstherealong; a cable roller over which said cable runs; a carriage uponwhich is mounted said roller and which is movable transversely of saidcable-railway to vary the point of contact of said cable with saidroller, and means for retaining said carriage in its adjusted position.

2. In a structure of the class described,

the combination of a cable-railway; a'cable for propelling the carstherealong; a cable roller over which said cable runs; a rack; acarriage upon which are mounted said roller and rack and which ismovable transversely of said cable-railway to vary the point of contactof said cable with said roller; and means mounted on said cable-railwayfor engaging said rack to retain said carriage in its adjustedposition.

Signed at Calumet, in the county of Houghton and State of Michigan, this19th day of October, A. D., 1914;, in the presence of the twoundersigned witnesses.

JOHN GEMMELL.

. Witnesses:

JOHN D. KERR,

EDITH M. BERRYMAN.

Copies of this patent may be obtained for five cents each, by addressingthe "Commissioner of Patents,

Washington, D. G.

